EARNINGS PER COMMON SHARE (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Basic and Diluted by Common Class

The following table sets forth basic and diluted net income per common share computational data (shares in thousands, except per share data):

	Three Months Ended March 31,
	2023		2022
Net income attributable to American Tower Corporation common stockholders	$	335.8	$	711.7
Basic weighted average common shares outstanding	465,741		455,946
Dilutive securities	1,069		1,265
Diluted weighted average common shares outstanding	466,810		457,211
Basic net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive (in thousands, on a weighted average basis):

	Three Months Ended March 31,
	2023	2022
Restricted stock units	5	106